Getting the Most out of Guest Experts Who Speak to Your Class. Inviting guest speakers into your classroom is a classic teaching strategy. Welcoming other voices into the classroom provides students with access to other perspectives, adds variety to the classroom routine, and demonstrates that learning is a collaborative enterprise. At the same time, however, presentations by guest experts are often plagued by a variety of design flaws that hinder their educational effectiveness. Here are five things you can do to prepare for an optimal experience.